EP ORGANIC CHEMISTRY,24 MONTH-OWLV2
9th Edition
ISBN: 9781305084391
Author: McMurry
Publisher: CENGAGE L
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Question
Chapter 20.SE, Problem 41AP
Interpretation Introduction
Interpretation:
The pKa of uric acid is 5.61. The percent dissociation of uric acid in urine at a pH=6.0 is to be calculated. Why uric acid is acidic even though it does not have a COOH group is to be explained.
Concept introduction:
The Henderson-Hasselbalch equation is
where, [A-] is the concentration of the dissociated uric acid and [HA] is the concentration of the undissociated uric acid.
A compound will be acidic and donate a proton, if the conjugate base obtained is stabilized by resonance.
To calculate:
The percent dissociation of uric acid in urine at a pH=6.0 if its pKa is 5.61 and to explain why uric acid is acidic even though it does not have a COOH group.
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A solution contains 0.097 M Ce3+, 1.55x10-3 M Ce4+, 1.55x10-3 M Mn2+, 0.097 M MnO4-, and 1.00 M HClO4 (F= 9.649 x 104 C/mol).
a) Write a balanced net reaction that can occur between species in this solution.
b) Calculate deltaG0 and K for the reaction.
c) Calculate E and deltaG for the conditions given.
Ce4+ + e- = Ce3+ E0= 1.70 V
MnO4- + 8H+ + 5e- = Mn2+ + 4H2O E0= 1.507 V
1. Provide a step-by-step mechanism for formation of ALL STEREOISOMERS in
the following reaction.
Na HCO3 (Sodium bicarbonate, baking soda) is not soluble in CH2Cl2. The powder is
a weak base used to neutralize strong acid (pKa < 0) produced by the reaction.
Redraw the product to show the configuration(s) that form at C-2 and C-4.
Br2
OH
CH2Cl2
Na* HCO3
Br
HO
OH
+ Na Br +
2. Specify the solvent and reagent(s) required to carry out each of the following FGI. If
two reagent sets must be used for the FGI, specify the solvent and reagent(s) for each
reagent set. If a reaction cannot be carried out with reagents (sets)
class, write NP (not possible) in the solvent box for reagent set #1.
Use the letter abbreviation for each solvent; use a number abbreviation for reagent(s).
Solvents: CH2Cl2 (A);
H₂O (B);
Reagents:
HBr (1);
R₂BH (6);
H2SO4 (2);
CH3OH (C);
Br₂ (3);
CH3CO₂H (D)
NaHCO3 (4);
Hg(OAc)2 (5);
H₂O2/HO (7);
NaBH4 (8)
Reagent Set #1
Reagent Set #2
FGI
+ enant
OH
Solvent Reagent(s) Solvent Reagent(s)
Chapter 20 Solutions
EP ORGANIC CHEMISTRY,24 MONTH-OWLV2
Ch. 20.1 - Give IUPAC names for the following compounds:Ch. 20.1 - Draw structures corresponding to the following...Ch. 20.2 - Prob. 3PCh. 20.2 - The Ka for dichloroacetic acid is 3.32 Ă— 10-2....Ch. 20.3 - Calculate the percentages of dissociated and...Ch. 20.4 - Which would you expect to be a stronger acid, the...Ch. 20.4 - Dicarboxylic acids have two dissociation...Ch. 20.4 - The pKa of p-cyclopropylbenzoic acid is 4.45. Is...Ch. 20.4 - Prob. 9PCh. 20.5 - Prob. 10P
Ch. 20.6 - Prob. 11PCh. 20.6 - How might you carry out the following...Ch. 20.7 - Prob. 13PCh. 20.7 - Prob. 14PCh. 20.8 - Cyclopentanecarboxylic acid and...Ch. 20.8 - Prob. 16PCh. 20.SE - Prob. 17VCCh. 20.SE - Prob. 18VCCh. 20.SE - The following carboxylic acid can’t be prepared...Ch. 20.SE - Electrostatic potential maps of anisole and...Ch. 20.SE - Predict the product(s) and provide the mechanism...Ch. 20.SE - Predict the product(s) and provide the mechanism...Ch. 20.SE - Prob. 23MPCh. 20.SE - Predict the product(s) and provide the complete...Ch. 20.SE - Acid-catalyzed hydrolysis of a nitrile to give a...Ch. 20.SE - Prob. 26MPCh. 20.SE - Naturally occurring compounds called cyanogenic...Ch. 20.SE - 2-Bromo-6, 6-dimethylcyclohexanone gives 2,...Ch. 20.SE - Naturally occurring compounds called terpenoids,...Ch. 20.SE - In the Ritter reaction, an alkene reacts with a...Ch. 20.SE - Give IUPAC names for the following compounds:Ch. 20.SE - Prob. 32APCh. 20.SE - Prob. 33APCh. 20.SE - Prob. 34APCh. 20.SE - Prob. 35APCh. 20.SE - Prob. 36APCh. 20.SE - Prob. 37APCh. 20.SE - Prob. 38APCh. 20.SE - Calculate the Ka's for the following acids: (a)...Ch. 20.SE - Thioglycolic acid, HSCH2CO2H, a substance used in...Ch. 20.SE - Prob. 41APCh. 20.SE - Prob. 42APCh. 20.SE - How could you convert butanoic acid into the...Ch. 20.SE - How could you convert each of the following...Ch. 20.SE - How could you convert butanenitrile into the...Ch. 20.SE - How would you prepare the following compounds from...Ch. 20.SE - Prob. 47APCh. 20.SE - Using 13CO2 as your only source of labeled carbon,...Ch. 20.SE - Prob. 49APCh. 20.SE - Which method-Grignard carboxylation or nitrile...Ch. 20.SE - Prob. 51APCh. 20.SE - Prob. 52APCh. 20.SE - Propose a structure for a compound C6H12O2 that...Ch. 20.SE - Prob. 54APCh. 20.SE - How would you use NMR (either 13C or 1H) to...Ch. 20.SE - Prob. 56APCh. 20.SE - A chemist in need of 2,2-dimethylpentanoic acid...Ch. 20.SE - Prob. 58APCh. 20.SE - Prob. 59APCh. 20.SE - Prob. 60APCh. 20.SE - Prob. 61APCh. 20.SE - Prob. 62APCh. 20.SE - Prob. 63APCh. 20.SE - The following pKa values have been measured....Ch. 20.SE - Identify the missing reagents a-f in the following...Ch. 20.SE - Propose a structure for a compound, C4H7N, that...Ch. 20.SE - Prob. 67APCh. 20.SE - The 1H and 13C NMR spectra below belong to a...Ch. 20.SE - Propose structures for carboxylic acids that show...Ch. 20.SE - Carboxylic acids having a second carbonyl group...
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